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High-temperature self-healing CoCrWSi coating based on defect-filling and pinning effects

发布时间:2025-09-18 点击次数:

影响因子: 8.2
DOI码: 10.1016/j.corsci.2025.112705
发表刊物: Corrosion Science
摘要: Co-29Cr-7W-5Si (wt%) was prepared via high-velocity oxygen-fuel system. Its oxidation behavior at 1100 °C in air containing water vapour was investigated. The oxidation kinetics of the coatings for 150 h was established using classical oxidation theory. After multiple cycles of thermal shock oxidation followed by water quenching, a dense Cr2O3 protective layer was formed on the surface of the coating, beneath which a SiO2 pinning layer was generated. Although this significantly enhanced its oxidation resistance, longitudinal cracks occurred because of thermal stress. After 144 cycles, the cracks underwent filling-type self-healing owing to rapid diffusion and oxidation.
论文类型: 期刊论文
卷号: 245
页面范围: 112705
发表时间: 2025-02-01
收录刊物: SCI
发布期刊链接: https://doi.org/10.1016/j.corsci.2025.112705
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